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Posted to issues@spark.apache.org by "Davies Liu (JIRA)" <ji...@apache.org> on 2016/03/01 00:13:18 UTC

[jira] [Created] (SPARK-13582) Improve performance of parquet reader with dictionary encoding

Davies Liu created SPARK-13582:
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             Summary: Improve performance of parquet reader with dictionary encoding
                 Key: SPARK-13582
                 URL: https://issues.apache.org/jira/browse/SPARK-13582
             Project: Spark
          Issue Type: Improvement
          Components: SQL
            Reporter: Davies Liu
            Assignee: Davies Liu


Right now, we replace the ids with value from a dictionary before accessing a column. We could defer that, especially when some rows are filtered out, we will not lookup this dictionary for those rows.



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